package com.itheima.reggie.common;

import com.baomidou.mybatisplus.core.handlers.MetaObjectHandler;
import com.itheima.reggie.util.BaseContext;
import lombok.extern.slf4j.Slf4j;
import org.apache.ibatis.reflection.MetaObject;
import org.springframework.stereotype.Component;

import java.time.LocalDateTime;

/**
 * 自定义元数据对象处理器
 */
@Component
@Slf4j
public class MyMetaObjectHandler implements MetaObjectHandler {
    /**
     * 插入操作 自动填充
     *
     * @param metaObject
     */
    @Override
    public void insertFill(MetaObject metaObject) {
        log.info("公共字段自动填充[insert]:{}", metaObject.toString());
        //strictInsertFill优势在于 当类中没有该属性时,就不会给该属性赋值,也不会出现异常
        strictInsertFill(metaObject, "createTime", LocalDateTime.class, LocalDateTime.now());
        strictInsertFill(metaObject, "updateTime", LocalDateTime.class, LocalDateTime.now());
        strictInsertFill(metaObject, "createUser", Long.class, BaseContext.getId());
        strictInsertFill(metaObject, "updateUser", Long.class, BaseContext.getId());

    }

    /**
     * 更新操作 自动填充
     *
     * @param metaObject
     */
    @Override
    public void updateFill(MetaObject metaObject) {
        log.info("公共字段自动填充[update]:{}", metaObject.toString());
        metaObject.setValue("updateTime", LocalDateTime.now());
        metaObject.setValue("updateUser", BaseContext.getId());
    }
}
